Both coaches didn't hear the siren and some maintain the goal, which gave Adelaide a 14-point lead in a tight game, was kicked after it sounded.

Umpires allowed the goal and the AFL has deemed the goal to have been kicked before the siren sounded.

"We have no issue that it was anything other than a goal," an AFL spokesman said on Friday.

It was the second time in recent weeks that a siren hadn't been instantly heard by umpires at Adelaide Oval, but the league said the new venue had the loudest siren of any AFL ground - 105 decibels.

The minimum volume at AFL grounds is in the 90-95 decibel range.

The AFL said the crowd noise at Adelaide Oval for both Crows and Port Adelaide games was so loud, there was an issue for fans and sometimes players in hearing the siren.

"We will explore with the stadium whether we look at extra banks of sirens around the ground in different positions, to help with it being heard, or whether it should in fact be louder," the spokesman said.

Adelaide coach Brenton Sanderson and his Collingwood counterpart Nathan Buckley both said they didn't hear the siren.

Buckley said the controversy wasn't a factor in his side's 21-point loss.

But Collingwood president Eddie McGuire disagreed, describing the incident as a "complete debacle".

"We have got to get this sorted out," McGuire said on Triple M radio in Melbourne on Friday.

"Bucks (Buckley) says it didn't affect the result. Well, it does.

"It does affect the result because they get an extra goal at a very, very pivotal moment ... it makes the AFL look shambolic."

The AFL said umpires, via ear pieces, were in contact with timekeepers, who could alert them if they hadn't responded to a siren.

"We have no issue that the umpires may not have control of the game by not being aware of the end of the quarter because they have direct contact with the communication system," the AFL spokesman said.